2, energy

it seems that there is only one source of energy which is inexhaustible, the nucleus of abundant elements

= Sun
we live because of the Sun, and because we are far enough from it
but this also means that the energy is dispersed on earth and to harness it we need a lot of space
solar power tower is a good method to do it
".data/solar-tower.png"

additionally we can use natural cyclic systems powered by the Sun:
, water cycle, which its use is almost saturated
, high altitude wind, like Magenn air rotor system

= energy storage
we can store energy in the electron arrangement of special materials
they are called batteries or fuels, if the released energy is electricity or heat, respectively

"https://en.wikipedia.org/wiki/Flow_battery"

fossil fuels are how nature stores energy, they have very good energy densities,
	but burning them pollutes air, and their natural resources will eventually expire
biofuel is a ridiculous and at the same time a sad lie
	it leads to more hunger, and it is the most inefficient way to harness the energy of the Sun

= nuclear energy
to export intelligence beyond the solar system, we need to harness nuclear energy directly

currently the most common way to harness nuclear energy is by splitting a heavy nucleus apart,
	a process called fission
in addition to not being an abundant energy source, fission is in general a very dirty process,
	producing high'level nuclear waste
though maybe new generation reactors can solve these problems (partially at least)

fusion:
"https://en.wikipedia.org/wiki/Fusion_power"
"https://en.wikipedia.org/wiki/Magnetized_Liner_Inertial_Fusion"
"https://en.wikipedia.org/wiki/Plasma-facing_material"
	"https://en.wikipedia.org/wiki/Neutron_radiation#Health_hazards_and_protection"
quantum gravity -> controlling gravity? -> fusion